Bug fixes to agents page, add deadman abilities

[argaudreau]

Description

This PR adds a feature and fixes a couple of bugs in the Abilities page:

• Add deadman ability selection to agent configuration
• Add button to kill all agents
• Fix "last seen" column tooltip error in Safari
• Fix agent alive/dead status in Safari

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• All dates show properly in agents page in Safari, Chrome, FF
• Kill all agents button removes all agents from lists and changes the watchdog and sleep timer values for each
• Deadman ability selection replicates bootstrap ability selection

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

[codecov]

Codecov Report

Merging #2354 (7ac057d) into master (7404bcd) will not change coverage.
The diff coverage is n/a.

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##           master    #2354   +/-   ##
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  Coverage   72.74%   72.74%           
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  Files         110      110           
  Lines        7948     7948           
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  Hits         5782     5782           
  Misses       2166     2166           

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[iguannalin]

I think the colors are very helpful, and I love the hover-effect over the # agents button to see it categorized into the agent statuses.
Two questions:

1. Is it possible to top-align the deadman searchbar to the Deadman Abilities label in the agent modal?
2. I noticed that when I delete/bulk-delete agents, the verification popup is using the browser's default popup--I can't remember if we've talked about this or not. What do you think about converting those to modals too for consistency?

[argaudreau]

1. Is it possible to top-align the deadman searchbar to the `Deadman Abilities` label in the agent modal?

Yep! Those are now top aligned.

2. I noticed that when I delete/bulk-delete agents, the verification popup is using the browser's default popup--I can't remember if we've talked about this or not. What do you think about converting those to modals too for consistency?

I've added a confirmation modal for all confirm actions to align with the rest of the site.

[iguannalin]

LGTM!!! Only one more nit-picky thing that I noticed--the field host_ip_addrs seems to be an array now so the display for that in the agent detail modal (next to 'Host') is an empty parentheses

[uruwhy]

LGTM - played around with some of the features

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication